Lamp-burner.



im. 721,358. Y PATBNTED PEB. 24, 1903.l

A. c, DmnsToN.l

LAMP BURNER.- APPLIFOTIDN FILED HAY 1, 1902.

9 UNITED STATES PATENT OFFICE.

ARTHUR CLARK DENNISTON, OF PHILADELPHIA, PENNSYLVANIA.

LAM P-BU RNER.

SPECIFICATION forming part of Letters Patent No. 721,358, dated February 24, 1903.

` Application led May 1, 1902. Serial No, 105,448. (No model.)

To @ZZ whom t may concern,.-

Be it knownthat I, ARTHUR CLARK DENNIS- TON, a citizen of the United States of America, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Lamp-Burners, of which the following is a true and exact description, reference being had to the accompanyingdrawings, which form a part thereof.

My'invention relates to central-draft lampburners, and especially to those in which the central draft is introduced at a point or points ence in speed in adjacent portions of the external and internal drafts, which drafts embrace the dame and are induced by-it; also,

to equalize more nearly than has heretofore been the case the physical conditions -of the saiddrafts on their Way through the burner; to contrive to be delivered at points adjacent upon the external and internal surfaces of a hollow flame drafts equated in temperature,

and in attaining the latter object to provide for a ready interchange in temperature b etween said external and internal drafts on their Way through the burner; to provide that from the point of entrance within the burner to the point of application in the flame the external and internal drafts shall be distinct and positively separated, and to contrive'and combine a mechanism or mechanisms adapted practically to attain above objects in a burner of the designated class.V

Still further objects are best to be understood from this specication as a whole.

Myinvention consists in the novel elements and combinations of devices'by which I carry the above objects into practice.

A new and useful feature of my invention also resides in the fact that even in the full preferred embodiment of my invention hereinafter illustratively described the burner shown in Fig. 2.

readily and completely takes down for cleaning.

Reference now being had to the accompanying drawings, which form a component part of this specification, my invention will be fonndillustrated as follows:

Figure l is a sectional elevation of a central-draft-lam p burner of the class described embodying my invention in its preferred form, the section being as if bya plane passed vertically through the lines l l of Figs. 2 and 4. Fig. 2 is, with the outer and preferably removable parts taken away, a plan view of the central and preferably permanently-engaged-parts of the burner shown in Fig. l. Fig. 3 is a side perspective View ofthe parts Fig. 4 shows by a cross-section through the parts shown in Fig. 2 a plane passed on line 4 4, Fig. 3, the parts below that line in plan. Fig. 5 is a side View in perspective of certain other parts assembled upon the portion shown in Figs. 2, 3, and 4.

Referring first to Fig. l, a metallic shell, the chief parts N N of which are preferably separable, will be seen to ,circumscribe the burner. The main middle portion of this shell is substantially globular, the upper part beingflanged at n10 to fit socketwise and claspingly upon a spigot-flange 716, which latter ange forms, the burner being in its Working position, the level brim of the lower part N. A corrugation a5 forms both a seat to the top member N and to the brim of the lower part N, in which it is formed, a stiffening de- Vice. The shell part N is apertured with intake-ports, as indicated in Fig. l by transixing-arrows. These ports are so distributed that they may be divided into distinct zones by what I shall call the petticoat P, which ports thus divided are severally appropriated to the external and internal drafts, the latter being indicated at n', Fig. l, by pairs of aforesaid transfixing-arrows. To form a convenient seat for the petticoat P, which` is here approximately a right hollow-cone frustum, preferably of aluminium, a highly-diathermous material, and also the better to connect the shell part N to the other part or parts, which below this pointform the remainder of the circumscribing shell, the part N is anged at n n2 to the L-section, (shown in Fig. 1,)

IOO

and to its tubular and downwardly-extending margin yn2 has affixed, as by brazing, an internally-screwthreaded ring n. The ring n3 has engaged with it a male threaded ring Je?, forming the upper member of a concentric hollow collar K. This collar, despite its thus, and by preference, separable nature, is but a part of the circumscribing shell and is preferably crimp-flanged and knurled at k, whereby it is stiifened and affords a handhold. Thence by an extension, preferably of the ogee section, (shown in Fig. 1,) collar K is connected to a lamp-socket-engaging ring k. The shell part N' above the socketflange `n10 is preferably corrugated for stiffness, and trending inward in uniform way forms within itself an upwardly-diminishing chamber M. This chamber acts as a speeding device or cone to the external draft the zone of whose intake-ports defined by the petticoat P is indicated in the spherical portion of shell part N by single transfixingarrows. On its top the part N has preferably an annular flange n, to which, as by rivets r, is aiixed the crenelated chimneyengaging gallery G, within and substantially parallel to which gallery the shell N then rises and in this instance terminates above combustion-ring H in a rim 11.13, (useful when the wicks are adjusted to their lower burningpoint to mask the fiame, butin itself, save it is part of the shell, not of my invention.) I have said that petticoat P is approximately a right hollow cone. Near its base it is preferably, however, provided (see Fig. 1) with an offset 192, upon the shoulder of which, preferably with freedom for removal, may be seated a perforated haiiie-plate R, here shown bottomless, disk-shaped, and having on its upper part a flange which nests snugly within the sllell-iiange n aforesaid. This baleplate by itself forms no part of my present invention, but lends to it, as it does to other burners in which it is a familiar device, cert-ain good features of which I am glad to take advantage. I have therefore shown how it may be conveniently yet removably associated in the preferred form of my invention.

Upon inspection of the Figsl and 5 petticoat P will be seen at p3 to have a slight deiiection or warp. This is to make the petticoat correspond, as near as may be, in form and eect to part N', the one acting as a cone upon the external, the other as a cone upon the internal drafts. (See the shell-included arrows, Fig. 1.) At its top p4, which top when assembled is parallel to but below the maskingrim als, petticoat P is of bigness and crosssection appropriate removably to clasp the external wall of the twin wick-tubes A A. These wick-tubes are preferably merged at their tops to form an annular hearth H, Figs. 1, 2, 3, but below the zone where they are clasped by top of petticoat P they are 'separated, so as t0 form between them the chamber C, also its communicating tunnels pp. These tunnels are preferably of the inverted-V 2 3, are preferably diametrically opposite) from transverse currents, and Fig. 1 how, the burner being in action, the said petticoat concentrates upon the tunnels p p impinging and (to the external draft) equally-heated volumes of air. I say equally heated, for the forebay M, being divided from the forebay F' by a petticoat of the aforesaid extended surface, diathermous nature, and unbroken continuity, once it is filled with external air, by way of its own proper zone of intakes, also defined by the petticoat P, must set up a heat interchange with that air which is at the same time stored in the forebay F and to have therewith a mutual reaction as to temperature without interchange of aerial volumes. It should also be obvious from inspection of Fig. 1 that neither draft-external or internal-whatever the cause can steal from the volume of heated equating air which at any given time is stored in the forebay of its mate. As they descend within the collar K the wicktubes A A', still curving marginally,are swept in toward each other and finally nest in and with conformity to the under periphery of the lamp-socket-engaging ring 7c aforesaid. This construction permits of the passage of broad wicksthroughasmalllamp-socket. Tofacilitate insertion of wicks, as well as to prevent spilling liquid fuel, the inner walls a2 a3, Fig. 1, of the wick tubes A A are best carried down below ring 7c and there joined by a plate a4. (See also Figs. 3 and 5.)

With collar K (the Walls of which are presumably perforated with the usual bearings for the neXt-to-be-described shafts S S') the chief wick lowering and raising devices are housed. These I form, preferably, of toothed wheels s s s' s', a pair for each wick, the pair members spread and fixed to their respective shafts S S. These shafts haved fixed to projectingendsthumb-wheels S2 Siand pass across said burner, as shown in Figs. 1, 2, and 4 viz., so that the shaft S (equipped with the toothed wheels s s of diameter sufficient to reach from it to within the wick-tube A) lies square across and, say, its own diameter to said wick-tubes side of the center of form of the burner, the said wick-tube A having, as indicated at as, Fig. 1, its inner wall slotted for the free entry of said wheels and the other shaft S passed tangentwise to the outside of the other wick-tube A', also at the same level and parallel to shaft S, the toothed wheels s s', fixed to this shaft S', being of such (here smaller) diameter as to reach from shaft S to within their proper wick-tube A', which tube, as indicated at a, Fig. 1, is slotted for IOO IIO

i their reception. `By thus passing one shaft between and the other without the wick-tubes and having wheels of proper reach I contrive that, despite said tubes, curvatures, and

Widely-spread middle parts, either wick raising or lowering shaft being given a like direction ofv motion will produce a like direction of wick raising or lowering.

vI/Vithin chamber C there is shown, Fig. 1, a horizontally-disposed bridge-plate B, its ends being brazed to the tubes A A. Upon this bridge is stepped a tubular socket b, into which is seated the tangt of a -removabledisk-shaped flame-deflector D.

A vertically-disposed plate B, (see-Figs. l and 2.)-This plate is in its central part bent toconform to one side of aforesaid socket b, to which it is also `fixed by brazing. Upon its `ends this plate has fixed a concentrically and vertically disposed thimble T. This thimble I prefer to employ, though in itself it is not ofl my invention, because it tends to equate the conditions of the internal drafts passage to those conditions which in passing along the vertical upper shell part N the external draft is subject to in this my novel burner.

If desired, the collar K maybe perforated, as shown in Figs. 3 and 5.

Figs. 2 and 4 show the typical circular crosssection of my preferred construction, which, as shown in Fig. 1, is substantially relatively symmetrical with relation to its vertical and major axis. y

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-4 Y speeding the internal drafts said cone being formed of and by the walls of Wick-tubes whose margins are curved toward each other whosetops are brought 'together to forma substantiallycircular and continuous burning-ring vand whose mid-bodies are spread apart to form opposite tunnels, said tunnels.

being for the access of air to the interior of said cone, a shaft passed through said tunnels and a shaft passed tangentwise and external to said cone and a finger-hold and a wick-engaging toothed Wheel or wheels fixed to each said shafts.

3. In a lamp-.burner of the over-font c enoral-draft type, the combination of a cone for speeding the internal drafts, said cone being formed of and by the walls of wick-tubes the margins of which tubes are curved toward each other,the tops of which tubes are brought together to form a substantially circular hearth, and the bottoms of which tubes are spread and distinct to form opposite tunnels, said wick-tubes and said tunnels, the latter giving access of air to the interior of said cone, a shaft passed through said tunnels, a shaft passed tangentwise and external to one ofV said wick-tubes, a iinger-hold and wickengaging toothed wheel or wheels fixed to each said shafts,whereby motion of said shafts in like direction produces like direction of raising'and lowering in the Wicks.

4. lIn a lamp-burner of theover-fontcentral-draft type, the combination of a lampsocket-engaging ring, wick tubes nested therein and curved in conformity thereto, said wick-tubes also being separate and outwardly molded above said ring to form an internal-draft cone with a burning-ring at the top thereof and also 'lateral tunnels giving access to the draft-cone.

5. In a lamp-burner of the over-font central-draft type, thecombination of a circumf `scribing shell, a part thereof tapering inwardly to form a speeding-np device for the external draft, twin wick-tubes nested therein, said wick-tubes each having their mar ginscurved toward those of the other, also so molded as to form between them an np- Wardly-diminishingchamber which speeds an internaldraft, said wick-tubes being also spread and separated for a portion of their llength to form draft-tunnels giving access to -from mingling their volume but allowing an interchange of heat between said drafts.

ARTHUR CLARK DENNISTON. Witnesses:

' CHAS. F. MYERS, D. STEWART. 

